Somehow, it has become a part of mainstream culture for iPhone and iPad users to quit all their apps in multitasking as some kind of regular tech maintenance ritual to improve battery life or speed up the hardware. An understanding of how iOS multitasking works however, shows that this is completely unnecessary to close every app in the multitasking view frequently. A 9to5Mac reader decided to ask Tim Cook for an official stance on whether he quits all his apps and if it’s necessary. Although Cook didn’t answer, Apple iOS chief Craig Federighi did with an unambiguous answer ‘no and no’ …